Method of manufacturing face masks, pseudo-reproductions of articles and the like, and alpha device for carrying this method into practice



H June 17, 1930. J KUPPER 1,764,215

ME D OF MA ACTURING FACE MASKS, PSEUDO REPRODUCTIONS 0F ARTICLES DEVICEFOR CAR NG 5 METHOD INTO PRACTICE Filed Nov. 19

A THE LIK AN A \&\

Patented June 17, 1930 UNITED STATES PATENT OFFICE.

JOSEF KIi'PPER, OF COLOGNE, GERMANY METHOD OF MANUFACTURING FACE MASKS,PSEUDO-REPRODUCTIONS OF ARTICLES AND THE LIKE, AND A DEVICE FOR CARRYINGTHIS METHOD INTO PRACTICE Application filed November 22, 1927, SerialNo. 235,065, and in Germany December 21, 1926.

10 folds.

According to this method the articles are made of the ready-glued fiatmaterial in one pressing procedure. The material from which the masketc. is to be made is placed in dry state over a matrix, the materialhaving been attached prior thereto to a frame and fastened to the sameonly on two sides or rims, preferably the short sides of the frame,whereas at the long sides or rims of the frame the material is permittedto hang through in sagged state. If the matrix must be deeper at one ofthe long sides owing to the shape of the article to be produced, theframe parts on the short sides are not parallel, but converge from themore shallow portion of the matrix to the less shallow portion of thesame, in consequence whereof the material hangs through or sags more onthis latter side than on the opposite side, where the matrix is moreshallow. These provisions constitute practically a preliminary shapingof the mask or other article or pseudo-reproduction of such a one andthe sagged material is stretched and subjected to tension only when thepatrix is lowered down upon it. so as to press the material into thematrix and shape it therein. The matrix and the patrix are employed inheated state, but I lay no claim upon this stage of the procedure, as itis known.

The method is carried into practice by means of the device illustratedon the drawing diagrammatically and by way of example. Figure 1 is avertical section through the device, and Figure 2 a plan of the frame towhich the material to be pressed and shaped is attached. In Fig. 1, 0denotes the patrix and I) the matrix. Both can be heated by gas-burnersh or the like. The

material or fabric or foil 0? to be pressed and shaped which isready-glued is attached in moist state to the frame 0 (Fig. 1) whichconsists of two converging members 6 e (Fig. 2) connected at theirnearer end by a member f. The material d is attached to the bottomsurface. of the frame members e e by pins 2' i z and the frame 0 f 6(Fig. 2), or c (Fig. 1) respectively, is held upon the matrix-holder inproper position by guide pins g extending downwardly from the frame andengaging suitably located bores in the matrix-holder.

I wish it to be understood that there may be departures of the detailsof the device without including a departure from the method.

I claim:

1. The method of stamping sheet material consisting in increasing thedegree of sag of the material in the vicinity of the portions of thedie,having the greatest surface irregularities.

2. The method of stamping sheet material consisting in increasing thedegree of sag of the material in the vicinity of the portions of the diehaving the greatest surface irregularities and clamping the edges of thematerial.

3. A device for stamping sheet material comprising a matrix and patrix,a frame for said material having sides converging in the direction ofthe portion of the matrix having the greatest surface irregularities,and means on said sides for holding said material.

In testimony whereof I afiix 1ny signature.

JOSEF KUPPER.

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